# Standard library header <initializer_list> (C++11)

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< cpp‎ | header

This header is part of the language support library.

### Classes
initializer_list (C++11) | references a temporary array created in list-initialization (class template)
### Functions
std::begin(std::initializer_list) (C++11) | overloads std::begin (function template)
std::end(std::initializer_list) (C++11) | specializes std::end (function template)

### Synopsis

    // all freestanding
    namespace std {
      template<class E> class initializer_list {
      public:
        using value_type      = E;
        using reference       = const E&;
        using const_reference = const E&;
        using size_type       = size_t;

        using iterator        = const E*;
        using const_iterator  = const E*;

        constexpr initializer_list() noexcept;

        constexpr size_t size() const noexcept;     // number of elements
        constexpr const E* begin() const noexcept;  // first element
        constexpr const E* end() const noexcept;    // one past the last element
      };

      // initializer list range access
      template<class E> constexpr const E* begin(initializer_list<E> il) noexcept;
      template<class E> constexpr const E* end(initializer_list<E> il) noexcept;
    }

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